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        <div>从代码层面上没有换行</div>
        <span class="box">box-11</span><span class="box">box-21</span><span class="box">box-31</span><span class="box">box-41</span><span class="box">box-51</span><span class="box">box-61</span><span class="box">box-71</span><span class="box">box-81</span><span class="box">box-91</span><span class="box">box-101</span>
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            <div>从代码层面上有换行，代码层面上有换行，然后每个element就有4px的间距，无语。。。</div>
        <span class="box">box-11</span>
        <span class="box">box-21</span>
        <span class="box">box-31</span>
        <span class="box">box-41</span>
        <span class="box">box-51</span>
        <span class="box">box-61</span>
        <span class="box">box-71</span>
        <span class="box">box-81</span>
        <span class="box">box-91</span>
        <span class="box">box-101</span>
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